The atoms of Group 7A elements _____ electrons when they form ions.
A. share
B. gain
C. lose
D. cannot be determined

There are various kind of elements that are present in periodic table. Some elements are harmful, some are halogens, some are radioactive. Option B is correct option.What is periodic table?Periodic table is a table in which we find elements with properties like metals, non metals, metalloids and radioactive element arranges in increasing atomic number.Periodic table help a scientist to know what are the different types of elements are present in periodic table so that they can discover the new elements that are not being discovered yet.Group 7A elements includes halogens elements like Fluorine, Chlorine, Bromine and iodine, whose electronegativity is very high in whole periodic table. These element gain electron very easily.Therefore, the correct option is option B.Learn more about periodic table, here:https://brainly.com/question/11155928#SPJ2

The answer is B. gain. The elements from group 7a is F, Cl, Br, I... These elements has 7 electrons at the outer shell. And they are likely to gain one electron to stay at stable status.